Asymmetrical in-fiber Mach-Zehnder interferometer for curvature measurement.
Bing Sun,Yijian Huang,Shen Liu,Chao Wang,Jun He,Changrui Liao,Guolu Yin,Jing Zhao,Yinjie Liu,Jian Tang,Jiangtao Zhou,Yiping Wang +11 more
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TLDR
A compact and highly-sensitive curvature sensor based on a Mach-Zehnder interferometer created in a photonic crystal fiber that exhibited a high curvature sensitivity and a temperature sensitivity suitable for high-sensitivity curvature sensing in harsh environments is demonstrated.Abstract:
We demonstrated a compact and highly-sensitive curvature sensor based on a Mach-Zehnder interferometer created in a photonic crystal fiber. Such a Mach-Zehnder interferometer consisted of a peanut-like section and an abrupt taper achieved by use of an optimized electrical arc discharge technique, where only one dominating cladding mode was excited and interfered with the fundamental mode. The unique structure exhibited a high curvature sensitivity of 50.5 nm/m-1 within a range from 0 to 2.8 m-1, which made it suitable for high-sensitivity curvature sensing in harsh environments. Moreover, it also exhibited a temperature sensitivity of 11.7 pm/°C.read more
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A dual-parameter fiber sensor based on few-mode fiber and fiber Bragg grating for strain and temperature sensing
Xuekai Gao,Tigang Ning,Chuanbiao Zhang,Jian Xu,Jingjing Zheng,Heng Lin,Jing Li,Li Pei,Haidong You +8 more
TL;DR: An optical fiber temperature and strain fiber sensor based on the fewmode fiber (FMF) and the fiber Bragg grating (FBG) is proposed and demonstrated in this article, which is fabricated by a length of FMF offset splicing with one section of single-mode fiber.
Journal ArticleDOI
Label-free detection of bovine serum albumin based on an in-fiber Mach-Zehnder interferometric biosensor
Zhengyong Li,Changrui Liao,Danni Chen,Jun Song,Wei Jin,Gang-Ding Peng,Feng Zhu,Ying Wang,Jun He,Yiping Wang +9 more
TL;DR: This biosensor is a sub-microliter dose and ultrasensitive at the low concentrations detected in BSA, which make it a promising for biochemical applications such as DNA hybridization, cancer screenings, medicine examination and environmental engineering, etc.
Journal ArticleDOI
Femtosecond Laser Inscription of Fiber Bragg Grating in Twin-Core Few-Mode Fiber for Directional Bend Sensing
Kaiming Yang,Jun He,Changrui Liao,Ying Wang,Shen Liu,Kuikui Guo,Jiangtao Zhou,Zhengyong Li,Zhan Tan,Yiping Wang +9 more
TL;DR: In this article, femtosecond laser inscription of fiber Bragg gratings (FBGs) in a twin-core few-mode fiber (TC-FMF) for directional bend sensing was demonstrated.
Journal ArticleDOI
Pure Directional Bending Measurement With a Fiber Bragg Grating at the Connection Joint of Eccentric-Core and Single-Mode Fibers
TL;DR: In this article, a novel fiber Bragg grating (FBG) structure based on an eccentric core fiber (ECF) and a singlemode fiber (SMF) was proposed and experimentally demonstrated for distinguishing the bending effect from the axial strain effect and measuring the pure directional bending.
Journal ArticleDOI
All-fiber MZI sensor based on seven-core fiber and fiber ball symmetrical structure
TL;DR: In this article, an all-fiber and compact Mach-Zehnder interferometric (MZI) sensor is proposed and experimentally demonstrated for the measurement of temperature and curvature.
References
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Journal ArticleDOI
All-fiber Mach-Zehnder type interferometers formed in photonic crystal fiber.
TL;DR: As potential applications of the all-PCF interferometer, strain sensing is experimentally demonstrated and ultra-high temperature sensing is proposed.
Journal ArticleDOI
All-Fiber Curvature Sensor Based on Multimode Interference
TL;DR: In this paper, a fiber-optic curvature sensor based on the singlemode-multimode-singlemode (SMS) fiber structure is developed, where the dependence of the wavelength shifts and intensity changes of three transmission notches on the applied curvature are different from each other.
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Mach-Zehnder interferometer formed in a photonic crystal fiber based on a pair of long-period fiber gratings.
TL;DR: The all-PCF Mach-Zehnder interferometer was formed by mechanically inducing two identical long-period fiber gratings (LPGs) in the PCF by mechanically induced two identicalLong-period Fiber gratings in thePCF to investigate the spectral properties of a LPG and a LGas pair.
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All-fiber Mach-Zehnder curvature sensor based on multimode interference combined with a long-period grating.
Orlando Frazão,Jaime Viegas,Paulo Caldas,Jose Luis Santos,F. M. Araújo,Luís Ferreira,Faramarz Farahi +6 more
TL;DR: A novel Mach-Zehnder interferometer based on a fiber multimode interference structure combined with a long-period fiber grating (LPG) is proposed and demonstrated as a bending sensor.
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A novel long period fiber grating sensor measuring curvature and determining bend-direction simultaneously
Yiping Wang,Yun-Jiang Rao +1 more
TL;DR: In this paper, a bend-sensor consisting of one LPFG induced by a UV laser and two LPFGs induced by high-frequency CO/sub 2/ laser pulses is proposed and demonstrated.